Newbie from SE MA ongoing small stuff

[big gray]

Hey guys, I think i have a 72 c-10 SWB but not sure. Someone has told me the frame was a mid eighties K-5 blazer. Oh ya the cast #'s on the block revealed it was an 89 305 block. The motor also has 350 heads. It was an ebay disaster but i love the truck. any ideas? I tend to do some off roading so i updated the interior over last winter . It has 2 prp racing suspension seats. a custom and carpeted center console with a 12 sub. I am currently redoing the fuel system and installing a TBI system. it never stops. I'll add more pics soon.
Eric.